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Method and system for removing low vegetation based on full-waveform lidar point cloud data

A technology of point cloud data and laser radar, which is applied in the field of remote sensing measurement, can solve the problems of decreased accuracy of surveying and mapping in areas with dense vegetation and the inability of the laser radar system to identify correctly, so as to reduce the workload

Active Publication Date: 2020-03-17
WUHAN MEASUREMENT OF SPATIAL INFORMATION TECH CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

This also means that the lidar system cannot correctly identify ground points under low vegetation, resulting in a significant drop in the accuracy of surveying and mapping in areas with dense vegetation

Method used

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  • Method and system for removing low vegetation based on full-waveform lidar point cloud data
  • Method and system for removing low vegetation based on full-waveform lidar point cloud data
  • Method and system for removing low vegetation based on full-waveform lidar point cloud data

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Embodiment

[0043] Such as figure 1 As shown, a low vegetation removal method based on full-waveform airborne lidar data includes the following steps:

[0044] Step 1. Carry a set of full-waveform LiDAR system on the aircraft carrier, including inertial measurement unit (IMU), differential GPS (DGPS), laser scanning ranging system and imaging device;

[0045] Step 2, using the full-waveform airborne lidar in step 1 for data collection, two sets of data can be obtained, which are the airborne lidar data generated by the full-waveform airborne lidar itself, and the full waveform data;

[0046] Step 3, according to the two sets of data obtained in step 2, extract the attribute characteristics of the two sets of data respectively, including the latitude and longitude coordinates of the point cloud, the scan angle and the amplitude value, peak position, echo width and intensity value of the full waveform data;

[0047] Step 4, the point cloud data obtained in step 3 is filtered using the TIN ...

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Abstract

The invention relates to a method and system using full waveform laser radar point cloud data to remove short vegetation; the method comprises the following steps: extracting airborne laser radar data point cloud attribute characteristics and full waveform data echo parameter information; building a decision tree mechanism to extract short vegetation; aiming at the obtained short vegetation data, using a statistics hypothesis examination method to decompose the data, thus obtaining the airborne laser radar point cloud data with short vegetation being removed.

Description

technical field [0001] The invention relates to a method and system for removing low vegetation, belonging to the field of remote sensing measurement, in particular to a method and system for removing low vegetation based on full-waveform laser radar point cloud data. Background technique [0002] Airborne LiDAR (Airborne Light Detection And Ranging, LiDAR) is an active aerial remote sensing earth observation system. It is an emerging technology first developed by Western countries and put into commercial application in the early 1990s. It integrates laser Rangefinder, Global Positioning System (GPS) and Inertial Measurement Unit (IMU) all in one. This technology has produced a major breakthrough in the real-time acquisition of three-dimensional spatial information, and provides a new technical means for obtaining high-spatial-resolution geospatial information. [0003] Most of the current laser radars use pulse ranging. In order to avoid confusion when two consecutive puls...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/48
CPCG01S7/4802
Inventor 马洪超周薇薇张良沈之平
Owner WUHAN MEASUREMENT OF SPATIAL INFORMATION TECH CO LTD